<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>自适应盒模型的特征</title>
    <style>
        .box{
            width: 300px;
            height: 300px;
            background-color: aquamarine;
            margin-top: 60px;
            margin-left: 100px;
            padding-top: 60px;
            padding-left: 100px;
            border-top: #eeeeee;

        }
        .box1{
            width: 100px;
            height: 100px;
            background-color: white;
            margin-top: 60px;
            margin-left: 50px;
            border-top: #eeeeee;

        }

    </style>
</head>
<body>
<div class="box">

    <div class="box1">我的第一个CSS样式</div>
</div>

</body>
</html>